Find a meetup on meetup.com. It doesn't have to be something you care too much about, it can be a singles meetup, some sport you know how to play, book club, etc. A lot of people are there mostly to do social stuff. Think of it as a way to meet people, but you have to work on deepening the friendships by asking them to do other stuff outside of the meetup after talking to them a few times.
I'm a member of 102 groups on Meetup. Not sports, because I have never played any sport, but many tech groups, reading groups, and hiking groups. No singles groups, because I'm not looking to date and I'm not in my 20s anymore (and don't feel like paying membership fees).
I have been methodically taking turns trying all of their in-person events.
Hiking groups are dominated by retirees who have trouble relating to me socially. I have not found a reading club that meets IRL. The "philosophy meetup" is a bunch of 25-year-old crypto bro edgelords. I keep going to tech meetups, some for over a year, but everyone at them either goes with coworkers or is really apathetic and alienated.
